CN111166466A

CN111166466A - Radio frequency ablation system

Info

Publication number: CN111166466A
Application number: CN201911420681.6A
Authority: CN
Inventors: 孙加源; 谢芳芳; 郑筱轩; 陈军祥; 潘玉均
Original assignee: Shanghai Chest Hospital
Current assignee: Shanghai Chest Hospital
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-05-19

Abstract

The embodiment of the invention discloses a radio frequency ablation system, which comprises: an ablation instrument and an ablation catheter; the ablation instrument includes: a housing and a controller; the controller is positioned in the shell; the ablation catheter includes: a needle tube portion and a handle portion; the handle portion includes: a barrel sleeve and a booster; the needle tube unit includes: puncture tube, electrode tube and signal conduit; the signal conduit includes: a plurality of supports and a plurality of temperature sensors; the other end of the signal conduit is provided with the plurality of brackets; the temperature sensors are electrically communicated with the brackets, and the temperature sensors are used for detecting the temperature near the sub-needles and transmitting the temperature to the controller through signal conduits. The tail ends of the brackets are provided with a plurality of temperature sensors, the temperature sensors are used for detecting the temperature near the sub-needle and transmitting the temperature to the controller through the signal conduit, so that the temperature range can be visually embodied on the radio frequency ablation system, and the ablation progress can be further judged.

Description

Radio frequency ablation system

Technical Field

The embodiment of the invention relates to the field of medical instruments, in particular to a radio frequency ablation system.

Background

Radio frequency ablation techniques are widely used in pulmonary treatment surgery. Radio frequency refers to radio frequency, but it does not belong to the division of bands in radio communications. The effect on the organism is mainly a thermal effect. When the current frequency of the radio frequency is high to a certain value (>100kHz), the movement of the charged ions in the tissue, namely, the frictional heating is caused (60 ℃ to 100 ℃). The frequency of the common use of the radiofrequency ablation equipment is 200-500 kHz, and the output power is 100-400 kHz. The ablation electrode is a core component of the radiofrequency ablation system, as it directly affects the size and shape of coagulation necrosis. The ideal shape of the coagulated region should be spherical or oblate spherical. Under the guidance of B-ultrasonic or CT, the multi-needle electrode is directly pricked into a lesion tissue lump, and the ablation catheter needle can ensure that the temperature in the tissue exceeds 60 ℃, so that cells die and a necrotic region is generated; if the local tissue temperature exceeds 100 ℃, the tumor tissue and the parenchyma surrounding the organ are subjected to coagulation necrosis, a large spherical coagulation necrosis area can be generated during treatment, and a heat treatment area of 43-60 ℃ is arranged outside the coagulation necrosis area, so that cancer cells can be killed in the area, and normal cells can be recovered.

During the treatment process, the radio frequency electrode is inserted into the human tissue, the current enters the focus through the radio frequency electrode, and a large amount of heat is generated at the radio frequency electrode, for example, when the temperature of the focus reaches 40-60 ℃ and is maintained for a period of time, the ablation operation of the focus is completed. However, the radio frequency ablation system in the prior art cannot judge the working state information of the radio frequency electrode, for example, cannot judge the temperature near the radio frequency electrode, so that the progress of the ablation operation can be judged and the adjustment operation can be performed only by the experience of a doctor in the operation process, and the operation difficulty and precision are increased. Therefore, how to provide a radio frequency ablation system which can accurately judge whether ablation is completed is a problem to be solved in the field.

Disclosure of Invention

The invention aims to provide a radio frequency ablation system, wherein a plurality of temperature sensors on a signal conduit are used for detecting the temperature near a plurality of sub-needles and transmitting the temperature variation range to a controller so as to obtain the specific range of the local temperature of the tissue in the operation process and further judge the ablation progress.

An embodiment of the present invention provides a radio frequency ablation system, including: an ablation instrument and an ablation catheter;

the ablation instrument includes: a housing and a controller;

the controller is positioned in the shell;

the ablation catheter includes: a needle tube portion and a handle portion;

the handle portion includes: the booster comprises a barrel sleeve and a booster, wherein the barrel sleeve is sleeved on the booster, the booster is arranged at one end of the barrel sleeve in a sliding manner, the booster is provided with a conductive connector, and the conductive connector is electrically connected with the controller;

the needle tube unit includes: puncture tube, electrode tube and signal conduit;

the puncture tube is fixed at the other end of the sleeve, the electrode tube is slidably arranged in the puncture tube, one end of the electrode tube is fixed on the conductive connector, a plurality of sub-needles are arranged at the other end of the electrode tube and are used for transmitting current provided by the conductive connector, the signal conduit is slidably arranged in the puncture tube and is positioned at one side of the electrode tube, and one end of the signal conduit is fixed on the conductive connector;

the signal conduit includes: a plurality of supports and a plurality of temperature sensors;

the other end of the signal conduit is provided with the plurality of brackets, and the plurality of brackets are positioned on one side of the plurality of sub-needles;

the temperature sensors are arranged on the brackets and electrically communicated with the brackets, and the temperature sensors are used for detecting the temperature near the sub-needles and transmitting the temperature to the controller through a signal conduit.

In one possible approach, the plurality of temperature sensors are located at the ends of the plurality of racks.

In one possible solution, the plurality of supports and the plurality of sub-needles are the same in number and are arranged alternately.

In one possible embodiment, the plurality of supports are arranged next to the plurality of sub-needles, and the plurality of sub-needles and the plurality of supports are spaced at the same interval.

In one possible approach, this includes: a fixing ring;

the fixing ring is located in the puncture tube and used for fixing the plurality of brackets and the plurality of sub-needles.

In a feasible scheme, a plurality of through holes are formed in the fixing ring, the number of the through holes is equal to the sum of the number of the brackets and the number of the sub-needles, and the brackets and the sub-needles are arranged on the through holes in a penetrating mode.

In one possible solution, the surfaces of the electrode tube and the signal conduit are provided with insulating layers for signal shielding.

In one possible approach, the temperature sensor may be a thermistor.

In one possible embodiment, the plurality of sub-needles are in a flower-like radial shape and the plurality of scaffolds are in a flower-like radial shape.

In a feasible scheme, a cover plate is connected to the shell, a front panel is connected to the front surface of the shell, and a display screen is mounted on the front surface of the front panel.

Based on the above solution, the rf ablation system of the present invention includes: a needle tube portion and a handle portion. The barrel sleeve on the handle part is sleeved on the booster on the handle part, and one end of the booster is provided with a conductive connector which is electrically connected with the controller. The puncture tube on the needle tube part is fixed at one end of the sleeve, the electrode tube and the signal conduit of the needle tube part are both fixed on the conductive connector, and the signal conduit is positioned at one side of the electrode tube. The tail end of the electrode tube is provided with a plurality of sub-needles, the tail end of the signal conduit is provided with a plurality of brackets, and each bracket is correspondingly provided with a capacitance thermometer. According to the radio frequency ablation system, the signal guide pipe and the electrode pipe are fixed on the conductive connector, the plurality of brackets are fixed on one sides of the plurality of sub-needles, and the plurality of brackets are provided with the corresponding capacitance thermometers which can be used for detecting the temperature change near the sub-needles. The radiofrequency ablation system releases current into human tissues through the electrode tube and the sub-needle, under the action of radiofrequency current of high-frequency vibration, a large amount of dielectric substances such as ions, water, colloid particles and the like in human body fluid move at high speed along with the current, and due to the fact that the size, mass charge and moving speed of each ion are different, the ions rub to enable the tissues to generate a biological heat effect, and the local tissues are heated. The capacitance thermometer on the bracket senses the temperature near the corresponding sub-needle and transmits the temperature to the controller through the signal conduit, and the temperature change in the human tissue can be visually displayed on the radio frequency ablation system. According to the temperature change range measured by the capacitance thermometer, the output current of the radio frequency ablation system is controlled, and then the ablation progress is judged, so that the controllability of the current in the operation can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an ablation catheter in accordance with a first embodiment of the present invention;

FIG. 2 is an enlarged partial view of a syringe according to a first embodiment of the present invention;

FIG. 3 is a schematic view of an ablation catheter in accordance with a third embodiment of the invention;

FIG. 4 is an enlarged partial view of a syringe according to a third embodiment of the present invention;

FIG. 5 is a schematic view of an ablation catheter in accordance with a fourth embodiment of the invention;

FIG. 6 is an enlarged partial view of a syringe according to a fourth embodiment of the present invention;

FIG. 7 is a diagram illustrating a push-out state of the booster according to the first embodiment of the present invention;

FIG. 8 is a perspective view of a sub-needle and a stent of a fourth embodiment of the present invention;

FIG. 9 is a schematic diagram of a five-latitude sub-needle and holder configuration according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of an ablator in an embodiment of the present invention;

FIG. 11 is an exploded view of an ablator in an embodiment of the present invention;

FIG. 12 is a side view of the overall structure of the present invention;

FIG. 13 is a schematic structural view of a reinforcement assembly of the present invention;

FIG. 14 is a schematic view of a heat dissipation block according to the present invention.

Reference numbers in the figures:

1. a needle tube portion; 11. a puncture tube; 12. an electrode tube; 121. a sub-needle; 122. a metal ball; 13. A signal conduit; 131. a support; 132. a temperature sensor; 2. a handle portion; 21. a barrel sleeve; 22. A booster; 221. a conductive joint; 3. a fixing ring; 31. a through hole; 4. an insulating layer; 51. a bottom case; 511. a cover plate; 512. a front panel; 5121. a display screen; 513. a ventilation window; 514. supporting legs; 52. a reinforcement assembly; 521. a cross bar; 522. a vertical rod; 523. a diagonal brace; 524. a fixing plate; 5241. Positioning blocks; 5242. a bolt; 53. a heat dissipating block; 531. a heat radiation fan; 532. and (3) a filter cartridge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for convenience in describing and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

The present embodiments provide a radio frequency ablation system comprising: an ablation instrument and an ablation catheter;

the ablation instrument includes: a housing and a controller;

the controller is located within the housing.

Fig. 1 is a schematic structural diagram of an ablation catheter in accordance with a first embodiment of the present invention.

The ablation catheter in this embodiment includes: a needle cannula part 1 and a handle part 2. Wherein, handle portion 2 includes: the sleeve 21 is sleeved on one end of the booster 22, the booster 22 can slide in the sleeve 21, the other end of the booster 22 is provided with an electric conduction connector 221, and in the embodiment, the electric conduction connector 221 is provided with four electrode jacks (not shown) which are used for inserting four electrode pins on a socket of the radio frequency ablation system. The needle tube portion 1 includes: puncture tube 11, electrode tube 12 and signal conduit 13. The electrode tube 12 and the signal conduit 13 are both arranged inside the puncture tube 11, and the signal conduit 13 is positioned at one side of the puncture tube 11 and can move in the puncture tube 11. One end of the puncture tube 11 is fixed at the tail end of the sleeve 21, one ends of the electrode tube 12 and the signal conduit 13 are fixed on the conductive connector 221, and the electrode tube 12 and the signal conduit 13 penetrate through the sleeve 21. When the driver 22 is pushed into the sleeve 21, the electrode tube 12 and the signal conduit 13 can be pushed out from the puncture tube 11 by the action of the driver 22 (as shown in the state of pushing out the needle tube part in fig. 7), and when the needle tube part is pushed out, the metal balls and the temperature sensors are arranged in a dispersed and staggered manner, so that the friction between the metal balls and the temperature sensors in the retracted state can be reduced. The electrode tube 12 is provided with a plurality of sub-needles 121, and the signal conduit 13 is provided with a plurality of brackets 131, wherein the number of the brackets 131 is equal to the number of the sub-needles 121. The sub-needle 121 on the electrode tube 12 is opened like an umbrella (see figure 2), and the bracket 131 is also released like an umbrella. The current on the radiofrequency ablation system is transmitted into the human tissue through the conductive connector 221, the electrode tube 12 and the sub-needle 121. A temperature sensor 132 is fixed to the end of each holder 131, the temperature sensor 132 may be a capacitance thermometer, a capacitor is used as a sensing element, and a conversion device for converting the measured temperature into a change in capacitance forms a capacitor with a variable parameter. With the rise of the temperature, the capacitance characteristic is gradually reduced, the change of the capacitance characteristic is fed back to the radio frequency ablation system, and the change range of the temperature can be visually seen. Under the action of radio frequency current of high-frequency vibration transmitted from the sub-needle 121, a large amount of dielectric substances such as ions, water and colloid particles in human body fluid move at high speed along with the current, and due to the difference of the size, mass charge and moving speed of each ion, the ions rub to generate a biological heat effect on tissues, so that the local tissues are heated, and a capacitance thermometer on the bracket 131 beside the sub-needle 121 can be used for detecting the temperature in the tissues. Each capacitive thermometer transmits the sensed temperature value to the controller via signal conduit 13, which converts the sensed temperature into a displayable output signal, visually representing the temperature range.

From the above, it can be seen that the rf ablation system of the present invention comprises: a needle cannula part 1 and a handle part 2. The sleeve 21 on the handle part 2 is sleeved on the booster 22 of the handle part 2, one end of the booster 22 is provided with a conductive connector 221, and the conductive connector 221 is electrically connected with the controller. The puncture tube 11 on the needle tube part 1 is fixed at one end of the sleeve 21, the electrode tube 12 and the signal conduit 13 of the needle tube part 1 are both fixed on the conductive connector 221, and the signal conduit 13 is positioned at one side of the electrode tube 12. The electrode tube 12 has multiple sub-needles 121 at its end, the signal conduit 13 has multiple holders 131 at its end, each holder 131 is correspondingly equipped with a capacitance thermometer, and the signal conduit, the holder and the capacitance thermometer are electrically connected. The radiofrequency ablation system of the invention is characterized in that the signal conduit 13 and the electrode tube 12 are fixed on the conductive connector 221, the plurality of brackets 131 are fixed on one side of the plurality of sub-needles 121, and the plurality of brackets 131 are provided with corresponding capacitance thermometers which can be used for detecting the temperature change near the sub-needles 121. The radiofrequency ablation system releases current into human tissues through the electrode tube 12 and the sub-needle 121, under the action of radiofrequency current of high-frequency vibration, a large amount of dielectric substances such as ions, water, colloid particles and the like in human body fluid move at high speed along with the current, and due to the fact that the size, mass charge and moving speed of each ion are different, the ions rub to enable the tissues to generate a biological heat effect, and the local tissues are heated. The capacitance thermometer on the bracket 131 senses the temperature near the corresponding sub-needle 121 and transmits the temperature to the controller through the signal conduit 13, so that the temperature condition in the human tissue can be visually presented on the radio frequency ablation system. According to the temperature change range measured by the capacitance thermometer, the ablation progress is further judged so as to adjust the output current of the radiofrequency ablation system, and therefore the controllability of the current in the operation can be realized.

As shown in fig. 2, optionally, in this embodiment, the electrode tube 12 has a plurality of sub-needles 121, the signal conduit 13 has a plurality of brackets 131, and the signal conduit 13 is fixed on one side of the electrode tube 12. The number of the sub-needles 121 is equal to the number of the brackets 131, one bracket 131 is disposed beside each sub-needle 121, and the distance and the angle between each sub-needle 121 and the bracket 131 are the same. For example, corresponding support a1 is arranged beside sub-needle a, corresponding support b1 is arranged beside sub-needle b, corresponding support c1 is arranged beside sub-needle c, each sub-needle 121 has corresponding support 131, the distance between sub-needle a and the end of support a1 is 0.2cm, the distance between the end of sub-needle b and the end of support b1 is 0.2cm, the distance between the end of sub-needle c and the end of support c1 is 0.2cm, the distances between sub-needle a and sub-needle b, sub-needle b and sub-needle c are 0.4cm, the distances between support a1 and support b1, and the distance between support b1 and support c1 is 0.4 cm. The distance between each sub-needle 121 is constant, and the distance between each holder 131 is also constant.

Optionally, in the present embodiment, a metal ball 122 is welded to the end of each sub-needle 121, and the ratio of the outer diameter of each metal ball 122 to the diameter of the sub-needle 121 is 1.05: 1.01. The outer diameter of the metal ball 122 is slightly larger than that of the sub-needle 121, and the metal balls are distributed in the tube in a staggered mode, so that the metal balls can be well retracted into the puncture tube. The metal ball, the sub needle and the electrode tube are electrically conducted. The surface area of the sphere is larger than the interface area of the sub-needle 121 and the human tissue, so that the release area of the current can be increased, more tissue cells can contact the current, and the working efficiency of the ablation catheter is improved.

Optionally, in this embodiment, the ablation catheter further comprises: and a fixing ring 3. The fixing ring 3 is clamped at a position which is not far away from the opening of the puncture tube 11, the fixing ring 3 is in a circular ring shape, a plurality of through holes 31 are formed in the circular ring, and the number of the through holes 31 is equal to the sum of the number of the sub-needles 121 and the number of the brackets 131. The diameter of the through hole 31 is larger than the diameters of the sub-needle 121 and the holder 131, the plurality of sub-needles 121 and the holder 131 are inserted into the through hole 31, and the diameters of the metal ball 122 and the capacitance thermometer are larger than the diameter of the through hole 31, so that the electrode tube 12 and the signal conduit 13 can be conveniently extended and the positions of the plurality of holders 131 and the plurality of sub-needles 121 can be fixed.

Optionally, in this embodiment, the outer walls of the electrode tube 12 and the signal conduit 13 are both wrapped by the insulating layer 4, the insulating layer 4 is made of plastic, and since current can pass through the electrode tube 12, the signal conduit 13 converts temperature into an output signal, so as to prevent interference between the electrode tube 12 and the signal conduit 13, the plastic on the outer walls of the electrode tube 12 and the signal conduit 13 can prevent signal interference between the electrode tube 12 and the signal conduit 13, thereby achieving the signal shielding effect.

The second embodiment is an alternative of the first embodiment, and is different in that the capacitance thermometer in the first embodiment is replaced by a thermistor, the thermistor is sensitive to temperature, shows different resistance values at different temperatures, and the resistance value is lower as the temperature is higher. Under the action of the current, ions and media in human tissues generate high-speed operation and generate heat locally, and the resistance value of the thermistor in a local range is reduced along with the increase of the temperature as the temperature is higher and higher. The thermistor, the bracket and the signal conduit are electrically conducted. When the resistance value of the thermistor changes, the change of the resistance value is transmitted to the controller through the signal conduit 13, and the change range of the local temperature of the resistance value is calculated according to the change of the resistance value on the radio frequency ablation system, so that the temperature can be further controlled by controlling the output current of the radio frequency ablation system.

Fig. 3 is a schematic structural diagram of an ablation catheter in a third embodiment of the invention.

As shown in fig. 3, the third embodiment is a modification of the first embodiment, and is modified in that the plurality of sub-needles 121 and the plurality of stents 131 are shaped like a flower radial (see fig. 4). The plurality of sub-needles 121 have different lengths, and the positions of the plurality of sub-needles 121 are symmetrically distributed about the central axis of the electrode tube 12. Assuming that there are 6 sub-needles 121 on the electrode tube 12, each sub-needle 121 is named a1, a2, a3, a4, a5 and a6, wherein a1 and a6 are symmetrical about the central axis of the electrode tube 12, a2 and a5 are symmetrical about the central axis of the electrode tube 12, and a3 and a4 are symmetrical about the central axis of the electrode tube 12. And the lengths of a1 and a6 are the same, the lengths of a2 and a5 are the same, and the lengths of a3 and a4 are the same, wherein a1 and a6 are located at the outermost side of all sub-needles 121 and have the shortest length, then a2 and a5 are located at the second side, and have a length greater than the lengths of a1 and a6, the longest lengths are a3 and a4, and a3 and a4 are located at the most middle position. According to the position arrangement, the position of each sub-needle 121 is different, so that the current flowing position is different, the current flowing range can be enlarged, and more human tissues can generate heat. The plurality of brackets 131 have different lengths, and the positions of the plurality of brackets 131 are symmetrically distributed about the central axis of the signal conduit 13. Assuming a total of 6 stents 131 on the signal conduit 13, each stent 131 is named b1, b2, b3, b4, b5 and b6, wherein b1 and b6 are symmetric about the central axis of the signal conduit 13, b2 and b5 are symmetric about the central axis of the signal conduit 13, and b3 and b4 are symmetric about the central axis of the signal conduit 13. And b1 and b6 are the same in length, b2 and b5 are the same in length, b3 and b4 are the same in length, wherein b1 and b6 are located at the outermost side of all the brackets 131 and are the shortest in length, next to b2 and b5 are the same in length, which is greater than the lengths of b1 and b6, the longest are b3 and b4, and b3 and b4 are located at the most middle position. The positions of the brackets 131 are set according to the positions of the sub-needles 121, each bracket 131 corresponds to one sub-needle 121, so that temperature values generated near the corresponding sub-needles 121 can be specifically measured by using capacitance thermometers on the brackets 131, and the temperatures measured by the capacitance thermometers are different according to different heat degrees generated by each sub-needle 121, so that the temperatures measured by the capacitance thermometers are different, the obtained temperatures are more targeted, and the obtained feedback data are different. These temperature values are transmitted to the controller via signal conduit 13 and a specific temperature range can be obtained.

Fig. 5 is a schematic structural view of an ablation catheter in accordance with a fourth embodiment of the invention.

The fourth embodiment shown in fig. 5 is a modification of the first embodiment, and is modified in that the plurality of sub-needles 121 and the plurality of brackets 131 are distributed in a spherical space. As shown in fig. 6, the plurality of sub-needles 121 may be named as c1, c2, c3, c4, c5 and c6, respectively, wherein c1, c2, c3, c4, c5 and c6 are sequentially arranged from left to right, and the lengths of c1, c2, c3, c4, c5 and c6 are equal. Since the six sub-needles 121 are distributed in a spherical space, although the six sub-needles 121 are located at different horizontal positions in the horizontal positions of the metal balls 122 on the c1, the c2, the c3, the c4, the c5 and the c6, according to the spherical space, the current radiation range from left to right is wider and the transverse distribution area is larger for the corresponding metal balls 122 on the six sub-needles 121 to be in the same latitude, which is beneficial for contacting with tissue cells on a more lateral side. The plurality of cradles 131 may be named d1, d2, d3, d4, d5 and d6, respectively, wherein d1, d2, d3, d4, d5 and d6 are arranged in sequence from left to right, each cradle 131 corresponds to one sub-needle 121, a capacitance thermometer on each cradle 131 is used to detect the temperature near the corresponding metal ball 122, and the lengths of d1, d2, d3, d4, d5 and d6 are equal. From the spherical space distribution diagram shown in fig. 8, since the six holders 131 are spherical space distribution, although the capacitance thermometers on the d1, d2, d3, d4, d5 and d6 are at different horizontal positions in horizontal position, the corresponding capacitance thermometers on the six holders 131 are at the same latitude according to the spherical space, and each capacitance thermometer transmits the detected temperature near the corresponding metal ball 122 to the rf ablation system through the signal conduit 13, so that the corresponding temperature variation range can be visually seen from the rf ablation system. And then the output current of the radio frequency ablation system can be adjusted according to the change of the temperature.

FIG. 9 is a schematic structural diagram of a sub-needle and a bracket at five same latitudes according to an embodiment of the invention.

The fifth embodiment shown in fig. 9 is a modified version of the first embodiment, and is modified in that the plurality of sub-needles 121 and the plurality of brackets 131 are distributed in a spherical shape. The multiple sub-needles may be named e1, e2, and e3, respectively, wherein the lengths of e1, e2, and e3 are equal. Since the three sub-needles 121 are distributed in a spherical space, the metal balls 122 on e1, e2 and e3 are at the same latitude in terms of spherical space, although the three sub-needles 121 are at different horizontal positions in the horizontal position, the corresponding metal balls 122 on the three sub-needles 121 are at the same latitude. The plurality of cradles 131 may be named f1, f2, and f3, respectively, one sub-pin 121 per each cradle 131, a capacitance thermometer on each cradle 131 for detecting the temperature near the corresponding metal ball 122, and the lengths of f1, f2, and f3 are equal. From the spherical spatial distribution shown in fig. 9, since the three holders 131 are spherical spatial distribution, although the capacitance thermometers on f1, f2, and f3 are at different horizontal positions in the horizontal position, the corresponding capacitance thermometers on the three holders 131 are at the same latitude in terms of spherical space. For this embodiment, the metal sphere and the capacitance thermometer are at the same latitude in the sphere space.

Referring to fig. 10-14, an ablation instrument in this embodiment includes a bottom shell 51, a cover 511 is connected to the bottom shell 51, a front panel 512 is connected to a front surface of the bottom shell 51, a connection portion between the cover 511 and the bottom shell 51 and a connection portion between the front panel 512 and the bottom shell 51 are all fixedly connected by a bolt 5242, so that an ablation instrument housing formed by the bottom shell 51, the cover 511 and the front panel 512 is provided, a reinforcing component 52 is provided in the ablation instrument housing, the reinforcing component 52 includes a crossbar 521, a vertical rod 522 is fixedly connected to the crossbar 521, an inclined strut 523 is fixedly connected to one end of the crossbar 521, a fixing plate 524 is fixedly connected to the other end of the crossbar 521, a top end of the vertical rod 522 and a bottom end of the inclined strut 523, positioning blocks 5241 are provided at two ends of the fixing plate 524, bolts 5242 are installed on the positioning blocks 5241, and two ends of the fixing plate 524 are respectively, The cover plate 511 and the front plate 512 are fixedly connected to form a three-point connecting fixing structure, so that the stability of the whole ablation instrument shell structure is improved, the pressure-resistant and load-bearing capacity of the ablation instrument shell structure is improved, and a space is provided for internal components.

In this embodiment, the bottom shell 51, the cover plate 511 and the front panel 512 are all made of aluminum alloy plates, and the materials have the advantages of good wear resistance and corrosion resistance, stable structure, low cost and the like, and the service life of the bottom shell is prolonged.

Further, the reinforcing component 52 is made of a steel material having good rigidity and toughness, so as to achieve a good supporting and reinforcing effect.

In addition, a display screen 5121 is mounted to the front surface of front panel 512 to facilitate functional operation of the ablator using display screen 5121.

It should be noted that the four corners of the lower surface of the bottom shell 51 are respectively connected with the supporting legs 514, so that the supporting legs 514 can be used to support the entire ablation instrument housing, and the bottom shell 51 and the ground form a certain height interval, thereby facilitating heat dissipation.

Specifically, the inclined strut 523 and the crossbar 521 are arranged in an inclined manner, and the inclined angle is set to 130-150 degrees, in this embodiment, the inclined angle between the inclined strut 523 and the crossbar 521 is preferably 150 degrees, so that the front panel 512 and the bottom case 51 can be conveniently fixed by using the inclined strut 523.

In addition, the vertical rods 522 and the cross rods 521 and the diagonal rods 523 and the cross rods 521 are fixed in a welding manner, and the three fixing plates 524 are also fixed on the cross rods 521, the vertical rods 522 and the diagonal rods 523 in a welding manner.

In this embodiment, the ablation instrument housing is composed of a bottom shell 51, a cover plate 511 and a front panel 512, and a reinforcing component 52 is arranged in the ablation instrument housing, the reinforcing component 52 includes a cross bar 521, a vertical bar 522 and an inclined strut 523, and one ends of the cross bar 521, the vertical bar 522 and the inclined strut 523 are all fixed on the bottom shell 51, the cover plate 511 and the front panel 512 respectively through a fixing plate 524, so that a three-point-connected fixing structure is formed, the stability of the whole ablation instrument housing structure is increased, the pressure-resistant and load-bearing capacity of the ablation instrument housing structure is improved, and the problem that the stability of the ablation instrument housing structure is poor.

Optionally, a ventilation window 513 is disposed on the lower surface of the bottom case 51, a heat dissipation block 53 is mounted at a position, located at the ventilation window 513, on the lower surface of the bottom case 51, a heat dissipation fan 531 is mounted on the heat dissipation block 53, and hot air formed in the bottom case 51 is drawn out after the heat dissipation fan 531 is powered on, so that a good heat dissipation effect is achieved.

Further, the lower surface of the heat dissipation block 53 is connected with a filter cartridge 532, and the filter cartridge 532 can prevent external dust from immersing the bottom shell 51 through the ventilation window 513 to damage the internal components of the ablation instrument, thereby achieving a good dustproof effect.

In addition, the radiating block 53 is formed by alternately superposing a plurality of aluminum sheets and copper sheets, the aluminum sheets have a good radiating effect, and the copper sheets have a good heat conducting effect, so that the radiating effect of the radiating block 53 can be further improved.

In this embodiment, the radiating block 53 is installed at the position of the ventilation window 513 on the lower surface of the bottom case 51, the hot air formed in the bottom case 51 can be taken out by the radiating fan 531 on the radiating block 53, a good radiating effect is achieved, the radiating block 53 is made by stacking a plurality of aluminum sheets and copper sheets alternately, the aluminum sheets have a good radiating effect, the copper sheets have a good heat conducting effect, the radiating effect of the radiating block 53 can be further improved, and the problem of poor radiating effect of the shell structure of the ablation instrument is solved.

When the reinforced ablation instrument shell structure is used, the ablation instrument shell is composed of a bottom shell 51, a cover plate 511 and a front panel 512, a reinforcing component 52 is arranged in the ablation instrument shell, the reinforcing component 52 comprises a cross rod 521, a vertical rod 522 and an inclined strut 523, one end of the cross rod 521, the vertical rod 522 and the inclined strut 523 are respectively fixed on the bottom shell 51, the cover plate 511 and the front panel 512 through a fixing plate 524 to form a fixing structure with three-point connection, the stability of the whole ablation instrument shell structure is improved, the pressure-resistant bearing capacity of the ablation instrument shell structure is improved, a heat dissipation block 53 is arranged at the position of a ventilation window 513 on the lower surface of the bottom shell 51, a heat dissipation fan 531 on the heat dissipation block 53 can draw out hot air formed in the bottom shell 51 to achieve a good heat dissipation effect, the heat dissipation block 53 is formed by alternately overlapping a plurality of aluminum sheets and copper sheets, and the aluminum sheets have a good, the copper sheet has good heat conduction effect, can further improve the radiating effect of the radiating block 53, solves the problems of poor structural stability and poor radiating effect of the ablation instrument shell, and is convenient to popularize and popularize.

In the present invention, unless otherwise explicitly specified or limited, the first feature "on" or "under" the second feature may be directly contacting the first feature and the second feature or indirectly contacting the first feature and the second feature through an intermediate.

Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radio frequency ablation system, comprising: an ablation instrument and an ablation catheter;

the ablation instrument includes: a housing and a controller;

the controller is positioned in the shell;

the ablation catheter includes: a needle tube portion and a handle portion;

2. The rf ablation system of claim 1, wherein the plurality of temperature sensors are located at distal ends of the plurality of stents.

3. The rf ablation system of claim 1, wherein the plurality of stents are the same number as the plurality of sub-needles and are arranged in an alternating arrangement.

4. The radio frequency ablation system of claim 3, wherein the plurality of stents are disposed adjacent to the plurality of sub-needles, and the spacing between the plurality of sub-needles and the plurality of stents is the same.

5. The rf ablation system of claim 1, comprising: a fixing ring;

6. The radiofrequency ablation system of claim 5, wherein the retaining ring has a plurality of through holes, the number of the plurality of through holes being equal to the sum of the number of the plurality of struts and the number of the plurality of sub-needles, the plurality of struts and the plurality of sub-needles being disposed through the plurality of through holes.

7. The rf ablation system of claim, wherein a cover is attached to the bottom housing, a front panel is attached to a front surface of the bottom housing, and a stiffening assembly is disposed within an ablation instrument housing formed by the bottom housing, the cover, and the front panel;

the reinforcement assembly comprises a cross rod, a vertical rod is fixedly connected to the cross rod, an inclined supporting rod is fixedly connected to one end of the cross rod, the other end of the cross rod, the top end of the vertical rod and the bottom end of the inclined supporting rod are fixedly connected with fixing plates, and the fixing plates are fixedly connected with a bottom shell, a cover plate and a front panel respectively.

8. The ruggedized ablator housing structure of claim 7, wherein: the two ends of the fixing plate are respectively provided with a positioning block, the positioning blocks are provided with bolts, and the two ends of the fixing plate are fixedly connected with the bottom shell, the cover plate and the front panel through the bolts on the positioning blocks.

9. The ruggedized ablator housing structure of claim 7, wherein: the inclined supporting rod and the cross rod are arranged in an inclined mode, and the inclined angle is set to be 130-150 degrees.

10. The ruggedized ablator housing structure of claim 7, wherein: the lower surface of the bottom shell is provided with a ventilation window, the lower surface of the bottom shell is provided with a heat dissipation block at the position of the ventilation window, and the heat dissipation block is provided with a heat dissipation fan.